Improvement in paint-brushes



I ff/ wf "zyn NJETEHS, PHOTO-LITHOGRAFMER, WASHINGTON, D. C.

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ALVIN MCDoNALD, or WASHINGTON, ILLINOIS, AssIeNoH or ONE-HALF Hrs HIGH-T To JAMES M. WHITE, oH--sAMH ILAoHI- d V Letters PatentNo. 108,923, dated November 1, 1870.

IMPROVEMENT IN PAINT-'BRUSHES- The Schedule referred to :in these Letters Patent and making part of the same To all uhom tt may concern Be it known that I, ALVIN McDoNALD, of the town ot' Washington, in the county of Tazewell and in the State of Illinois, have invented a new and usefnl Paint-Brush; and do hereby declare that the following is a full, clear, and exact description thereof', reference being had to the annexed drawing making a part of this specification, in which like letters of ret'- erence refer to like parts, and in which- Figure 1 represents a view of the shell or ring in which the bristles are placed;

Figure 2, a plan view in detail of expanding seg ments;

Figure 3, a perspective view in detail of segments,

cone, and screw;

Figure 4, a sectional View of' brush, with handle Like letters in the dilerent figures ofthe drawing indicate like parts.

Thisdevice is composed of expanding segments, provided with recesses on their bottom edges, and arranged around a truncated cone, the latter causing the segments to press the bristles against the shell ot' the bra/sh, and also to turn the ends of the bristles in the recesses so as to secure them more firmly.

B C are the segments, which are pivoted ,together at a, their free ends finishing in a point, the lower part of the segment C having a recess, b, for retaining the ends of the bristles, (see figs. 3 and 4.)

Iwo of these coupled segments placed opposite each other form a circle, the segment-B of each couple resting on the surface of each segment lettered C.

These are .placed at the bottom' of the shell A of brush, and a cone, l), through whose axis a screw, E, freely passes, the end of latter screwing into the butt of the handle F, which comes tlush with the hole at the bottomof the shell A, inclosed by a rim for further securing the handle.

, brush.

The operation of this device is as follows:

The segments B G and B 0 are placedaround the hole in the butt of the brush and the bristles inserted. The cone and screw are then inserted, thelatter drawing the cone by its inclinedI face against each ot' the segments, causing the expansionf the latter, and consequent pressure against the bristles, which are thus tightly confined between the segments and the shell A. The recess b, at the bottom of each of the segments `next to the butt ot' the handle, retains the end of the bristles, and prevents them from drawing or working out. `When the bristles are worn ont fresh ones are to be inserted.

I am aware of the patent of Jacob Rayls, January 25, 1870, in which segments are used, but it will be observed that they are constructed in two parts only,

while I make these in four parts, pivoting or hanging two of each together, and provide .them with recesses b, so that the ends of thev bristles will be caused to` f turn therein, (see iig. 4,) thnsavoiding any liability of their drawing o1' workingout.

Having thus fully described my invention, What I claim therein as new, and'desire to secure by Letters Patent, is Y The segments B Cpivoted together at a, their free ends finishing in a point, and the lower part of segment C having a recess, b, for retaining the ends of the bristles, invcoinhina-tion with the cone 1), screw E, shell A, and handle F, all as shown and set forth.

In testimony that Icla'im the foregoing paint-brush, I have hereunto set my hand this 10th day ot' May, A. D. 1ero. l

ALVIN vMCDONALD. \Vitnesses:

EDIIUND THURLOW, WM. Jaen. 

